(function($) {
  $.fn.jCarouselLite = function(o) {
    o = $.extend({
      btnPrev: null,
      btnNext: null,
      btnGo: null,
      mouseWheel: false,
      auto: null,
      speed: 200,
      easing: null,
      vertical: false,
      circular: true,
      visible: 2,
      start: 0,
      scroll: 1,
      beforeStart: null,
      afterEnd: null
    }, o || {});
    return this.each(function() {
      var running = false,
          animCss = o.vertical ? "top" : "left",
          sizeCss = o.vertical ? "height" : "width";
      var div = $(this),
          ul = $("ul:first", div),
          tLi = $(".car", ul),
          tl = tLi.size(),
          v = o.visible;
      if (o.circular) {
        ul.prepend(tLi.slice(tl - v - 1 + 1).clone()).append(tLi.slice(0, v).clone());
        o.start += v;
      }
      var li = $(".car", ul),
          itemLength = li.size(),
          curr = o.start;
      div.css("visibility", "visible");
      li.css({
        overflow: "hidden",
		"border-right": "1px solid #aaa",
		"margin-right": "8px"
        float: o.vertical ? "none" : "left"
      });
      ul.css({
        padding: "0",
        position: "relative",
        "list-style-type": "none",
        "z-index": "1"
      });
      div.css({
        overflow: "hidden",
        "z-index": "2"
      });
      var liSize = o.vertical ? height(li) : width(li);
      var ulSize = liSize * itemLength;
      var divSize = liSize * v;
      li.css({
        width: li.width()
      });
      ul.css(sizeCss, ulSize + "px").css(animCss, -(curr * liSize));
      div.css(sizeCss, divSize + "px");
      if (o.btnPrev) $(o.btnPrev).click(function() {
        return go(curr - o.scroll);
      });
      if (o.btnNext) $(o.btnNext).click(function() {
        return go(curr + o.scroll);
      });
      if (o.btnGo) $.each(o.btnGo, function(i, val) {
        $(val).click(function() {
          return go(o.circular ? o.visible + i : i);
        });
      });
      if (o.mouseWheel && div.mousewheel) div.mousewheel(function(e, d) {
        return d > 0 ? go(curr - o.scroll) : go(curr + o.scroll);
      });
      if (o.auto) setInterval(function() {
        go(curr + o.scroll);
      }, o.auto + o.speed);

      function vis() {
        return li.slice(curr).slice(0, v);
      };

      function go(to) {
        if (!running) {
          if (o.beforeStart) o.beforeStart.call(this, vis());
          if (o.circular) {
            if (to <= o.start - v - 1) {
              ul.css(animCss, -((itemLength - (v * 2)) * liSize) + "px");
              curr = to == o.start - v - 1 ? itemLength - (v * 2) - 1 : itemLength - (v * 2) - o.scroll;
            } else if (to >= itemLength - v + 1) {
              ul.css(animCss, -((v) * liSize) + "px");
              curr = to == itemLength - v + 1 ? v + 1 : v + o.scroll;
            } else curr = to;
          } else {
            if (to < 0 || to > itemLength - v) return;
            else curr = to;
          }
          running = true;
          ul.animate(animCss == "left" ? {
            left: -(curr * liSize)
          } : {
            top: -(curr * liSize)
          }, o.speed, o.easing, function() {
            if (o.afterEnd) o.afterEnd.call(this, vis());
            running = false;
          });
          if (!o.circular) {
            $(o.btnPrev + "," + o.btnNext).removeClass("disabled");
            $((curr - o.scroll < 0 && o.btnPrev) || (curr + o.scroll > itemLength - v && o.btnNext) || []).addClass("disabled");
          }
        }
        return false;
      };
    });
  };

  function css(el, prop) {
    return parseInt($.css(el[0], prop)) || 0;
  };

  function width(el) {
    return el[0].offsetWidth + css(el, 'marginLeft') + css(el, 'marginRight');
  };

  function height(el) {
    return el[0].offsetHeight + css(el, 'marginTop') + css(el, 'marginBottom');
  };
})(jQuery);